Overview Of Tuning Settings And Resources Used - Acom 04AT Operating Manual

In the rare case something goes wrong and the procedure
fails, close the UPLOAD window with the CLOSE button.
In the ATU SERVICE menu select a different line on the
amplifier screen and then go back to the UPLOAD position.
Repeat the procedure as described above.
6.2.8 AGING AND REFRESHING OF SETTINGS
The TUNING SETTINGS OUTDATED function allows the operator to specify a "period
of validity" or "time period allowed" of the settings retrieved by the "quick tuning" com-
mands from the tuner memory. The hours are presented as a "total time the tuner was
powered".
The limits of the aging alarm can be specified by the operator in four stages: [100 – 300
– 1000 – 3000] hours.
Each setting retrieved from tuner memory comes with the number of hours that the
tuner has been in operation since the time the setting was stored, up to the time it was
retrieved. If the time period of the retrieved setting is older than the limit specified by
the operator, the alert text TUNING OUTDATED is displayed on the amplifier screen,
but the outdated tuning settings can still be used.

6.3 OVERVIEW OF TUNING SETTINGS AND RESOURCES USED

When the menu ATU TUNING SETTINGS LOOK UP/ERASE is accessed, data lines
start scrolling the screen (for approximately 5s) – a line per frequency segment with the
current operating band, and the current operating antenna. If up/down arrows appear
on the right of the screen, this means there are more frequency segments to be viewed
by scrolling up/down.
The following data is displayed on each line:
- Antenna number, selectivity and name
- Frequency boundaries of tuning validity (frequency segment)
- Resource used (in percentage of maximum inductors and capacitors usable for
the respective frequency)
- Tuning age in hours ("- - - -" means "no tuning")
ACOM 04AT uses an L-shape matching network configuration. The abbreviations used
below mean:
- CT is the capacitor connected in parallel to the transmitter (tuner input);
- L is the inductance connected between transmitter and antenna;
- CA is the capacitor connected in parallel to the antenna (tuner output).
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NOTE